NDLI: Overexpressed glutamine synthetase gene modifies nitrogen metabolism and abiotic stress responses in rice

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Overexpressed glutamine synthetase gene modifies nitrogen metabolism and abiotic stress responses in rice

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Overexpressed glutamine synthetase gene modifies nitrogen metabolism and abiotic stress responses in rice

Content Provider	Springer Nature Link
Author	Cai, Hongmei Zhou, Ying Xiao, Jinghua Li, Xianghua Zhang, Qifa Lian, Xingming
Copyright Year	2009
Abstract	Glutamine synthetase (GS; EC 6.3.1.2) is a key enzyme in nitrogen metabolism; it catalyzes the critical incorporation of inorganic ammonium into glutamine. Two full-length cDNAs that encode the rice (Oryza sativa) cytosolic glutamine synthetase1 genes (OsGS1;1 and OsGS1;2) were isolated from a Minghui 63 normalized cDNA library, and glnA encoding GS in Escherichia coli was isolated by PCR amplification. Transformants for GS gene (GS1;1, GS1;2, and glnA) in rice were produced by an Agrobacterium tumefaciens-mediated transformation method, and transcripts of GS gene accumulated at higher levels in the primary transgenic plants. Our results indicated an increased metabolic level in GS-overexpressed plants, which showed higher total GS activities and soluble protein concentrations in leaves and higher total amino acids and total nitrogen content in the whole plant. Decreases in both grain yield production and total amino acids were observed in seeds of GS-overexpressed plants compared with wild-type plants. In addition, GS1;2-overexpressed plants exhibited resistance to Basta selection and higher sensitivity to salt, drought, and cold stress conditions, whereas the other two types of GS-overexpressed plants failed to show any significant changes for these stress conditions compared with wild-type plants.
Starting Page	527
Ending Page	537
Page Count	11
File Format	PDF
ISSN	07217714
Journal	Plant Cell Reports
Volume Number	28
Issue Number	3
e-ISSN	1432203X
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-01-03
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Glutamine synthetase gene Nitrogen metabolic level Yield Abiotic stress Rice Plant Biochemistry Biotechnology Plant Sciences Cell Biology
Content Type	Text
Resource Type	Article
Subject	Plant Science Medicine Agronomy and Crop Science

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